Road-scarifier.



PATBNTED SEPT. 24, 1907.

B. w. TUCKER. ROAD SGARIFIBR. APPLICATION FILED DBU. 30| 1905.

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bp@ 0N VEILLE,... -l L f No. 866,698. PATENTED SEPT. 24, 1907.

` B. W. TUCKER.

ROAD vSGARIPIERl APPLICATION FILED DEO. 30. 1905.

3 SHEETS-SHEET 2.

PATENTED SEPT. 24, 1907.

B. W. TUCKER. ROAD SGARIPIER. .ILPPLIGMIQN- Hum 1220.30.1905.

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BENJAMIN W. TUCKER, OF NEWARK, NEW JERSEY.

ROAD-SCARIFIER.

Specification of Letters Patent.

Patented Sept. 24, 1907.

Application filed December 30. 1905. Serial No. 294,006.

To all whom it may concern:

Be it known that I, BENJAMIN W. TUCKER, a citizen of the United States,residing in the city of Newark, in the county of Essex and State of NewJersey, have invented certain new and useful Improvements inRoad-Scariliers, oi which the following is a specification.

This invention relates to the class oi wheeled devices or implementsemployed for scarifying Telford (and similar) roads, for purposes ofrepair. Ordinarily these implements have three wheels, namely, a pair ofmain supporting wheels and a small pilot-wheel in front and the obliquegang of picks is disposed in front of the main bearing .wheels Theseimplements have certain defects which the present invention seeks toobviate.

To this end, one of the features of this invention consists in disposingthe gang of picks behind the supporting wheels and in providing meansfor raising and lowering the picks so that the extent of theirpenetration may be nicely regulated, and another feature consists inproviding the implement with two pairs of groundwheels, or supportingwheels, a bed-frame pivotally mounted on the truck frame between saidpairs oi"v Wheels, a gang of picks carried at each end of said bedframe,and means for adjusting said bed-frame so as to put either gang of picksin operation at will.

Other constructive points will be hereinafter described and the novelfeatures oi 'the invention carefully defined in the claims.

In the accompanying drawings, which illustrate embodiments oi theinvention-Figure l is a side elevation oi the implement in itsdouble-ended form, and Fig. 2 is a plan of the same. Fig. 3 is avertical, axial, longitudinal section of one end of the same, the planeof the section being indicated by line x3 in Fig. 2. Fig. 4 is adetached view of one of the picks. Figs. 5, 6 and 7 show a single-endedform of the implement. Figf5 is a side elevation and Fig. G a plan. Fig.7 is a sectional detail view on a large scale, the plane of the sectionbeing indicated by line x7 in Fig. 5.

Referring primarily to the first four figures oi the drawings, whichillustrate the principal form in which the invention is embodied, ldesignates a truck-frame, supported on two pairs of ground-wheels 2, 2.On the truck-frame, at a point midway between the pairs ofground-wheels, is pivotally mounted a bed-frame 3, which carries at itsrespective ends gangs of picks 4, 4. As herein shown the axles 5, 5, oithe ground-wheels have bearings in the respective ends oi thetruck-frame (Fig. 3), and the shaft or hinge-bar 6, about which thebed-frame rocks, passes through the side-bars of the truck-frame andthrough bearing-sockets on the bottom of the bed-frame. In thebed-frame, at each end thereoi, is a housed nut 7 (Fig. 3) down throughwhich passes a screw 8, which finds a bearing at z on the tinckframc. Bymeans of these screws 8, and a suitable movable crank 9 (Figs. l and 2)which lits squares on the screws, the bed-frame may be rocked about theshaft G, so as to depress one gang of picks into operative position andsimultaneously elevate tlIe other gang so as to be out oi operation. Thebar 4, carrying the picks is disposed obliquely to the axis ol' theimplement (Fig. l), as usual; and as herein shown this bar is formedintegrally with the bed-irame, though this is not essential. Nor is theoblique disposal ol the gang oi picks essential to the invention.

One important feature of the construction is the disposal of theoperative gang of picks back of or behind the main ground-wheels of themachine, with the picks inclined forward toward the rear wheels. Thisplaces the weight of the implement and its center of gravity in front ofthe operating gang of picks as the implement is drawn over the road.Another important point is that all the bearing points oi the Wheels arealways in l'ront of the operative gang of picks, whether there be one ortwo gangs, and no wheel is behind or following said gang; and there arenever more than two wheels, or pairs Of wheels, on the implementdisposed tandem or in the line of travel. Where there are three wheelsor rolling bearings disposed one before the other in the line of travel,one wi ll, almost inevitably, be lifted ofi the surface and causetrouble. The present construction provides that the operative gang ofpicks shall always be at the extreme rear of the implement. Theimplement may be drawn, of course, by any power; that is, by horses orby a motor-vehicle oi any kind, the power being Coupled to the bed-frameby any suitable connecting means, as by the links l0, for example, Theremay be box ll in the bed-frame, for road-tools, and it may be providedwith a hinged cover l2.

The construction illustrated in Figs. 5, 6 and 7 is lighter than thatabove described. In this construction there is but one pair oiground-wheels 2, and the axle 5l thereof iinds its bearings inbearing-brackets on the bottom of the bed-frame 3u. Thus the truck-framel and shaft or bar G are eliminated and the bed-frame rocks on the axlefor raising and lowering the gang of picks 4. In this construction thebar 4b of the picks is not disposed obliquely (although it may be sodisposed), but the picks are behind the ground-wheels and back of thecenter of gravity of the implement, and they incline forward toward thewheels, as in the construction already described. m

For raising and lowering the picks there isa device in front of theground-wheels which will now be described. This device consists of aguide-frame 13, on the iront end oi the bed-frame 3, and provided withinclined guides 14, (Fig. 7) in which slides a block 15, carrying at itslower end a wheel 16, which bears on the ground. In the block l5, above,is housed a nut 7, and

down through this nut passes an adjusting screw 8, which is collared at17 in a bridge-piece of the frame 13. By means of this screw 8 thebedsirame may be rocked and the gang oi picks raised or lowered asdesired.

Such an implement as has been described is usually employed in repairingTelford and similar roadways, but obviously it may be employed for otheruses to which it is applicable. The number of picks in the gang is notimportant to this invention, nor is the particular' orm or length of thepick important; but it is important that the picks, fastened at their'upper ends in the bar, shall incline downward and inward toward thepivotal point of the bed-trame.

Having thus described my invention, l claim- 1. An implement for thepurpose specified, having'a body portion, supporting wheels under thesame, a gang ot' picks carried at the end of said body, and means forputting said picks in and out of their operative position, all o1 thesupporting' wheels of Athe implement being` in t'ront ol the picks whenthe latter are in operative position.

2. An implement for the purpose specified, having' two pairs o1'ground-wheels, a truck-frame mounted thereon, a bed-frame pivotallymounted on the truck-fra1ne, a gang' of picks carried by each extremityof the bed-frame, the picks in said gangs being inclined with theirpoints directed inward or toward the pivotal point of the bedrame, andmeans for rocking or turning,r said bed-frame about its pivot, thesupporting wheels of the implement beinfr all disposed between thel twogangs of picks, as specified.

An implement for the purpose specified, havingl a bedrame, two gangs ofpicks carried by said frame at its respective extremities, a truckfra1neon which said bedA frame is pivotally mounted at substantially themiddle o1 the length of the truck-frame, two pairs of ground-wheelsunder and supporting.;l said truck-fra1ne, said pairs ol wheels, whichform the sole support of the implement, being disposed between the twogangs of picks and, respectively, at opposite sides of the pivotal axisof the bedl'rame, and means for turning the latter' about its pivot forraising' or lowering; either gang of picksA 'l. Au implement for thepurpose specified, having two pairs of ground-wheels, a truck-framesupported thereon, a bed-frame pivotally mounted on said truck-frame ata point between said pairs ot' wheels, two gangs of picks, one gang ateach end ot' the bed-frame and carried thereby, nuts 7 in the bedframeat opposite sides of the pivotal point ol said frame, and screws 8 whichextend down through the respective nuts and bear on the truck-frarne Animplement for the purpose specified, having two pairs of groundwvheels,a trucleframe supported thereon, a bed-frame pivotally mounted ou saidtruck-frame at a point between said pairs of wheels, two gangs of picks,one ,gang at each end ol' the bed-frame and carried thereby, thepicks'of both gangs being secured at their upper ends and being inclineddownward and inward toward the pivotal peint ot the bed-frame, nuts 7 inthe bed-frame at opposite sides of the pivotal point of said frame, andscrews S which extend down through the respective nuts and bear on thetruck-frame.

ln witness wherernF I have hereunto signed my name this 11th day of Dec.1005, in the presence of two subscribing witnesses.

BENJAMIN W. TUCKER.

Witnesses HENRY CONNETT, WILLIAM J. FIRTH.

